17.2.2 ApplicationUse a common global source for example GPS time synchronization inside eachsubstation as well as inside the area of the utility responsibility to achieve a common timebase for the IEDs in a protection and control system. This makes comparison and analysisof events and disturbance data between all IEDs in the power system possible.Time-tagging of internal events and disturbances are an excellent help when evaluatingfaults. Without time synchronization, only the events within the IED can be compared toone another. With time synchronization, events and disturbances within the entire station,and even between line ends, can be compared during evaluation.In the IED, the internal time can be synchronized from a number of sources:• SNTP• IRIG-B• DNP• IEC60870-5-103Micro SCADA OPC server should not be used as a time synchronizationsource.17.2.3 Setting guidelinesSystem timeThe time is only possible to set inside the IED via the local HMI by navigating toConfiguration/Time/SYSTEMTIME with year, month, day, hour, minute and second.SynchronizationWith external time synchronization the setting how to synchronize for the real-time clock(TIME) are set via local HMI or PCM600.TimeSynchThe setting TIMESYNCGEN is used to set the source of the time synchronization. Thesetting alternatives are:CoarseSyncSrc which can have the following values:• Disabled• SNTP• DNP• IEC60870-5-1031MRK 506 334-UUS A Section 17Basic IED functions471Application manual
